Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-456 A Hawthorne CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
424-456 0 Hawthorne CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2006-10-10   
424-456 1 Hawthorne CA   515J IP HORIZON LLC 730   2006-10-09   
424-456 2 Hawthorne CA   515J IP HORIZON LLC 730   2006-10-09   
424-456 3 Hawthorne CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2007-08-10   
424-456 4 Hawthorne CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2007-01-10   
424-456 5 Hawthorne CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2007-08-31   
424-456 6 Hawthorne CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2016-10-06   
424-456 7 Hawthorne CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2007-09-21   
424-456 8 Hawthorne CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730   2007-09-03   
424-456 9 Hawthorne CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2007-09-21   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.